cupholder drain funnel

Drain funnel to be installed on the bottom of my pontoon boat cup-holders to drain water safely out of pontoon seat cup holder without damaging seat frame.

Interior top of funnel is 74mm and fits over ~3inch cup holder. Interior lip of funnel is 20mm to cradle cup holder. Bottom of funnel is designed to install 1/2inch onto 1/2inch schedule 40 PVC water piping.

I plan on installing with rubber cement or caulk to allow for removal if maintenance is necessary.

This funnel is inspired by https://www.thingiverse.com/thing:2239561 by riskable https://www.thingiverse.com/riskable/designs